And some kept a sense of humor about the incident: “Keep the babies, and ditch the men’s jacket rule,” one local posted.

Instead of traditional reservations, the restaurant offers a ticketed system, where diners must pay between $210 and $265 up front for the tasting-menu-only dinner (the price does not include tax, tip or beverages). The restaurant does not accept walk-ins.

Eater Chicago reports that that the couple’s sitter canceled at the last minute (likely story!), but Alinea does allow diners to sell or giveaway their diner tickets, which must be booked weeks, even months, in advance.

Dinner at the restaurant is an event—about three hours long with 18 courses, all artfully and painstakingly prepared, and sent out into a sleek dining room.

There’s no sign out front; diners open a big, heavy door and walk down a long hallway, then and step onto something that triggers an automatic sliding door,

Courses might include duck five ways with choice of 60 garnishes, or an edible balloon.

“It all adds up to a place where a baby would not make any sense whatsoever,” Ruby said. “If I had paid all that money and had been sitting at next table, I’d be pissed—and I have a baby. If you asked 100 people, 99 out of the 100 would say a baby should not be there.”

Full disclosure: On Friday night, my husband I brought our 4-month-old out to eat at a semi-decent place for the first time. But it was a neighborhood kind of restaurant, we went at 5:30 p.m., and I would never dream of bringing her anywhere with a tasting menu, let alone a place on the World’s 50 Best Restaurants List. We lucked out and she was an angel, but I was terrified the entire time, making me wonder, is this worth it?

As Ruby told us, “I couldn’t mind anything else less fun than bringing a baby to Alinea. It’s like how the parents of a screaming baby on an airplane are always more miserable than the people around them, because they know they’re driving everyone around them nuts.”

So far, the chef has stayed mum on his official verdict—requests for further comment have gone unanswered—but Achatz did playfully post a picture of two stuffed fish heads on Twitter last night: